1/3 × (4x^2-12x+9)×(2x+3)=... mohon bantuannya

1/3 × (4x^2-12x+9)×(2x+3)
= (4/3x²-4x+3)(2x+3)
= 8/3x³+4x²-8x²-12x+6x+9
= 8/3x³-4x²-6x+9
= 8x³-12x²-18x+27

maaf kalo salah, smoga mmbantu,,